body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
}

.upload-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 300px;
}

.upload-container h1 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #333;
}

#fileInput {
    margin-bottom: 15px;
}

button {
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

button:disabled {
    background: #cccccc;
    cursor: not-allowed;
}

button:hover:not(:disabled) {
    background: #0056b3;
}

.progress-bar {
    width: 100%;
    background: #eee;
    height: 20px;
    border-radius: 4px;
    margin: 20px 0;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: #28a745;
    width: 0;
    transition: width 0.2s;
}

#uploadStatus {
    font-size: 14px;
    color: #555;
}
